Not exactly. The Gainestown E5520 2.26 quad is actually more like $380 or so, not $800 (a pair would be $800, but that's a different matter). I wasn't recommending it necessarily, but it is the way to go for a high end professional level photo video rig. It is more expensive than a single i7 setup though, and would only benefit fairly serious and continuous photo or graphic design type work, and is certainly not the best choice for everyone.
As for the OP, I would say that they certainly seem to be referring to this - there really isn't any other CPU out there that fits "two 2.26 i7". Your statement about gaming is completely separate - games tend not to be CPU bound, and even the games that are CPU bound tend to be bound by a single thread performance, not multithreaded, so a dual socket has almost no gains at all in gaming, while in something completely CPU bound and multithreaded, like some photo editing, graphic design, and video editing software, the gains are there and real from a dual socket. There's a reason the Mac Pro is a dual socket, and it isn't because it is supposed to be a server.